Vyatta create and update IP based ban lists from Spamhaus

You can use Spamhaus, or a number of other lists in a Vyatta firewall configuration. In this case we create a network group called ‘blocked’ from the Spamhaus blacklists. Then this network group can be used in firewalls to drop traffic. Use cron to update the list every day, or once a week.

#!/bin/bash
# FILE: /usr/local/sbin/updateBanList.sh
# AUTHOR: ForDoDone fordodone@fordodone.com
# DATE: 2013-10-01
# NOTES: Script to update IP ban list.  Run from cron, and integrate into firewall
# 

# variables
VERBOSE=0
DROPURL='http://www.spamhaus.org/drop/drop.txt'
EDROPURL='http://www.spamhaus.org/drop/edrop.txt'

# simple logger function
logger(){
  if [ "$VERBOSE" == "1" ]
  then
    echo "$@"
  fi
}

# set verbose flag if given
if [ "$1" == "-v" ]
then
VERBOSE=1;
fi

# create or truncate tmp file
>/tmp/block

# get drop file
wget -q $DROPURL -O - | grep ^[0-9] | sed -e 's/;.*//' >> /tmp/block
if [ $? -ne 0 ]
then
  logger "error getting drop file"
  logger "exiting..."
exit
fi

# get edrop file
wget -q "$EDROPURL" -O - | grep ^[0-9] | sed -e 's/;.*//' >> /tmp/block
if [ $? -ne 0 ]
then
  logger "error getting edrop file"
  logger "exiting..."
exit
fi
logger "received `wc -l /tmp/block | awk '{print $1}'` networks to block..."

logger "starting vyatta cmd wrapper"
/opt/vyatta/sbin/vyatta-cfg-cmd-wrapper begin

# remove existing list, in case a network has been removed"
logger "deleting existing blocked network group"
/opt/vyatta/sbin/vyatta-cfg-cmd-wrapper delete firewall group network-group blocked

# add each network to the block list
logger "building new blocked network group"
logger "this might take a while..."
for i in `cat /tmp/block`;
do
  /opt/vyatta/sbin/vyatta-cfg-cmd-wrapper set firewall group network-group blocked network $i
done;

# now commit the changes
logger "committing changes"
/opt/vyatta/sbin/vyatta-cfg-cmd-wrapper commit

logger "ending vyatta cmd wrapper"
/opt/vyatta/sbin/vyatta-cfg-cmd-wrapper end

# clean up
rm -rf /tmp/block >/dev/null 2>&1

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